Question

a, 3x5+2x3+3x3      b,2x9+5x9+27           ai dung milk tich nha v nhanh lon

Answer 1

Umk, OK bạn

Answer 2

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Answer 3

TL:

a) 3 x 5 + 2 x 3 + 3 x 3

= 3 x (5 + 2 + 3)

= 3 x 10

= 30

b) 2 x 9 + 5 x 9 + 27

= 2 x 9 + 5 x 9 + 3 x 9

= (2 + 5 + 3) x 9

= 10 x 9

= 90

HT

Answer 4

(k) r nha b